style: 移除 Tab 导航和卡片内部左右 padding

- TabNavigation/SubTabContainer: 移除左侧 padding (pl=0)
- BusinessStructureCard/BusinessSegmentsCard: 移除 CardBody 左右 padding
- BusinessTreeItem: 黑金主题样式优化

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/components/SubTabContainer/index.tsx

@@ -147,7 +147,8 @@ const SubTabContainer: React.FC<SubTabContainerProps> = memo(({
           bg={theme.bg}
           borderBottom="1px solid"
           borderColor={theme.borderColor}
-          px={4}
+          pl={0}
+          pr={4}
           py={2}
           flexWrap="wrap"
           gap={2}